按照国际隧道协会（I√A）定义的隧道的横断面积的大小划分标准分类，隧道可分哪几类及其划分标准是多少？
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On notification by Admiralty Notice to Mariners that a new edition of one of the books，or a new supplement to one，has been published，it should be obtained（）.
A. as soon as possible
B. prior to its publication
C. in advance of any possible accident
D. by means of other than airmail
有使血糖浓度降低作用的是（）
A. 抗利尿激素
B. 甲状腺素
C. 肾上腺素
D. 生长激素
E. 胰高血糖素
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